
Although still broadly available across the world, the traditional, well established, circuit switch (CS) mobile voice service with its well-known ability to provide subscribers high Quality of Experience (QoE) since the introduction of 2G services, is clearly fading.
The evolution to 3.5G (HSPA+) already unleashed the technical means for Voice over Internet Protocol (VoIP) based solutions using mobility, such as the more or less free over-the-top (OTT) voice services like Skype and Viber.
Lately, by the means of more widely spread and more mature LTE networks, VoIP solutions have become higher quality, and, more importantly, have allowed leading LTE carriers to deploy Voice over LTE (VoLTE) as the voice service solution with guaranteed QoE.
Download our whitepaper to explore how TEMS supports operators with VoWiFi solutions, from initial rollout to optimization and achieving stable service.
Related articles and publications

Automated Single Site Verification
Learn how to streamline single site verification using your commercial device and a cloud-based system—simplifying a time-sensitive task all operators...

Maximize ROI of CBRS
Yann Le Helloco explains how to maximize CBRS ROI with network automation, planning tools, and TEMS for optimized 4G/5G deployment and performance

TEMS™ Cloud – Orchestrate, monitor, analyze and report on your network testing projects
Optimize your network testing projects with enhanced efficiency, control, and analytics available with TEMS Cloud

March 2025 | New releases, innovations, and success stories
Discover our latest product releases and new capabilities, inspiring customer success stories, and key insights from our testing experiment at MWC

Sweet Spot Detection in TEMS™ Pocket
Discover how Sweet Spot Detection in TEMS™ Pocket helps you find optimal testing spots and simplifies your site verification process

How a major European MNO uses the TEMS™ Suite to deliver its 5G network
Explore how a European operator used TEMS to provide a 5G network that delivers for both the business and its customers

How a leading European operator is maximizing the value from its portfolio of TEMS™ solutions
Discover how an operator leveraged TEMS to efficiently deploy a 5G network, achieving business goals and exceeding customer expectations

umlaut provides mobile network benchmarking services using TEMS™
Learn how umlaut and Infovista, together, provide the most comprehensive network benchmarking services globally

Automated Single Site Verification
Learn how to streamline single site verification using your commercial device and a cloud-based system—simplifying a time-sensitive task all operators...

Maximize ROI of CBRS
Yann Le Helloco explains how to maximize CBRS ROI with network automation, planning tools, and TEMS for optimized 4G/5G deployment and performance

Sweet Spot Detection in TEMS™ Pocket
Discover how Sweet Spot Detection in TEMS™ Pocket helps you find optimal testing spots and simplifies your site verification process

Testing network experience at MWC25 with TEMS™ Pocket Backpack
Discover how we tested network performance at Mobile World Congress Barcelona 2025 with TEMS Pocket Backpack

Collecting structured data in TEMS™ Paragon
Discover how to ensure a structured execution of your testing workflow, from work order creation to field data collection and results processing

Leveraging cloud-based analytics to streamline network drive testing analysis and reporting
Discover how TEMS Cloud automates drive test analysis, enhances reporting, and streamlines workflows. Optimize your testing with cloud-based insights!

Mastering FWA: optimizing network experience, maximizing profitability
Discover how to Unlock FWA success to optimize every stage of your network lifecycle

Leveraging generic testing techniques to validate the user experience for OTT apps
Watch this webinar to learn how generic testing techniques can help you overcome the challenges you face with OTT testing

Managing a new RF environment and how network testing needs to evolve
How can operators leverage automation, AI/ML and Cloud to deploy and operate their 5G network and how does active testing and service assurance fit in...

The evolution of test and measurement in the move to disaggregated, cloud-native 5G networks
Explore how cloud-native networks impact testing and validation. Industry experts discuss AI/ML roles, testing complexity, and multi-cloud challenges....

How to successfully test the user experience of OTT video streaming on mobile networks
Learn how to successfully and cost-effectively validate the user experience of OTT video streaming services on your network

OTT telephony application testing (2/2)
See how Infovista’s generic OTT telephony application testing approach was validated to be a representative benchmark for native OTT telephony app tes...

OTT telephony application testing (1/2)
Explore the generic OTT telephony application concept, its codec/client adaptation and settings, and recommended KPIs to be used for testing.

Mobile gaming user experience
Find out how to test UX interactivity for one of the most rapidly growing application areas: cloud gaming over mobile networks

Introduction to POLQA v3
POLQA is an objective perceptual QoE metric that predicts the overall listening speech quality of narrowband (NB) to super-wideband (SWB) telecommunic...